I have the same question as Alok.
One example is during the staging process. I want to have the latest version on both partitions.
If there is a command to copy the image from one partition to the other, I only need to transfer the image only once from my TFTP/SCP-Server.
Second example is, if you have several devices, which have different images in primary and secondary partition and you need to align both partition. With a copy command, this can be done without the need of the image file itself.
What do you think?